Industries

How can a practice or clinic check phone numbers and emails on intake forms?

Check the phone number and email domain on each appointment request, and read the public page of a referring organization, before front desk staff start calling back. You get facts about format and type, not any health information.

The problem

A new appointment request often comes through an online form. The phone number is the main way the office reaches the patient, and a number with a missing digit or the wrong country prefix means a missed call and a gap in the schedule.

Front desk teams have a short list of calls to make each morning. Knowing which numbers are well formed and which type the numbering plan assigns helps them skip toll-free and premium-rate entries and spend their time on entries that can be reached.

These checks should be narrow. Only the single phone number or email domain needs to be looked up, and nothing about the visit has to leave your system.

The CDC National Center for Health Statistics lists 1.0 billion physician office visits, from the 2019 National Ambulatory Medical Care Survey. 2019. CDC National Center for Health Statistics, FastStats: Physician Office Visits, read 2026-10-18.

What LookValid does for this

LookValid products for Healthcare
Check	What it gives you	Credits
Clean numbers on appointment requests	Parses each number against its country numbering plan and returns E.164, national and international formats with the number type the plan assigns, such as toll-free or premium-rate. US and Canada numbers usually come back as fixed line or mobile. It cannot say whether the number is active.	1 credit per valid number
Check the domain on reminder emails	Reads MX, SPF and DMARC for the domain and flags disposable domains and free providers. It does not contact the mail server and cannot confirm that a mailbox exists.	1 credit per address checked
See the original carrier for US numbers	Returns the carrier originally assigned the number block with its rate center and state, from public NANPA reports. Ported numbers still show the original carrier.	1 credit per lookup (numbers outside the covered numbering plan areas are free)
Read the contacts a referrer publishes	For referral partners and vendors, reads a domain public pages and returns the emails, phone numbers and social profile links they publish.	10 credits per domain with contacts found

A real request and response

This request checks the number from an appointment request. The response gives the formats to store, the country and the number type the plan assigns.

POST /v1/phone

1{
2  "phone": "+12025550143"
3}

Response, captured 2026-10-18

1{
2  "found": true,
3  "data": {
4    "valid": true,
5    "possible": true,
6    "e164": "+12025550143",
7    "national_format": "(202) 555-0143",
8    "international_format": "+1 202 555 0143",
9    "country_calling_code": "1",
10    "country": "US",
11    "number_type": "fixed_line_or_mobile",
12    "line_type_source": "numbering-plan",
13    "carrier": null,
14    "area_code": "202",
15    "area_code_region": {
16      "code": "DC",
17      "name": "District of Columbia"
18    },
19    "extension": null,
20    "notes": "Line type comes from the numbering plan, not from a carrier. Carrier, porting, line status and reachability are not included; this check cannot say whether the number is active or has been moved to another carrier."
21  }
22}

This is one real run of Phone Numbering-Plan Validation against a fixed public input, captured 2026-10-18. Sources: Google libphonenumber metadata (Apache-2.0); NANPA area code report (nanpa.com).

Questions

Does a lookup send patient or visit details?

No. A request carries only the single value being checked, such as one phone number or one email address. You never need to include a name, a visit reason or any record.

Can it tell me which numbers are mobile so I can send texts?

It returns the number type the numbering plan assigns, such as mobile, fixed line or VoIP. Plans can mark ranges as fixed line or mobile, so treat the type as a strong hint, not a guarantee about the line.

Can it confirm a patient owns a number or email?

No. It reads numbering-plan rules and domain records. It cannot say who uses a number or a mailbox.

Sources

CDC National Center for Health Statistics, FastStats: Physician Office Visits https://www.cdc.gov/nchs/fastats/physician-visits.htm, read 2026-10-18

LookValid is run by Meralume Labs. It is not connected to, endorsed by or a partner of any company or product named on this page, and every product name belongs to its owner.

LookValid bills every lookup in credits from one shared balance, so one key covers each check on this page.

See Phone Numbering-Plan Validation